1903 Windows 10 roll out.

I do not rush to install these big updates and am content to wait until they are routinely offered. Has anyone not on an insider programme or not installed it manually, been updated via the normal route?

I take the same view as you wrt these updates. I've not had it (1903) come through yet, am currently on 1809 which seemed to arrive late on my machine for some reason, compared to others.

I've read that some have experienced issues with the 1903 update, so appears MS didn't learn any lessons from the poor 1809 rollout. I'll wait until it comes through as opposed to self-inflicting problems on my machine.

The new option is available on Windows 10 version 1803 or 1809 devices that have the May 21st updates (or later) installed.
The new version of Windows 10 that is Windows version 1903 has been launched. Given below are the steps to install the new version:
1. First of all,Open the Settings application with the Windows-I shortcut.
2. Now, go to Update & Security > Windows Update.
3. Now you are required to activate the "check for updates" button.
4. Windows Update queries Microsoft's servers for updates. It may come back with the feature update and show the option to "download and install now" in the interface.
5. For installing the latest version select ‘download and install’ and follow the other technical processes.